LTC2512-24
24-Bit Over-Sampling ADC
with Configurable Flat Passband Digital Filter
FEATURES
DESCRIPTION
The LTC®2512-24 is a low noise, low power, high-perfor-
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±±11pm INmꢀ(y1)
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±±7dBmDynapicmRangemꢀ(y1)matm50ks1s
±08dBmDynapicmRangemꢀ(y1)matm400ks1s
Guaranteedm24-BitsmIomMissingmCodes
ConfigurablemDigitalmFiltermwithmSynchronization
mance 24-bit ADC with an integrated configurable digital
filter. Operating from a single 2.5V supply, the LTC2512-
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24 features a fully differential input range up to VREF
with V
,
ranging from 2.5V to 5.1V. The LTC2512-24
REF
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RelaxedmAnti-AliasingmFiltermRequirepents
supports a wide common mode range from 0V to V
REF
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DualmOut1utm24-BitmSARmADC
simplifying analog signal conditioning requirements.
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24-BitmDigitallymFilteredmNowmIoisemOut1utm
The LTC2512-24 simultaneously provides two output
codes: (1) a 24-bit digitally filtered high precision low
noise code, and (2) a 22-bit no latency composite code.
The configurable digital filter reduces measurement noise
by lowpass filtering and down-sampling the stream of
data from the SAR ADC core, giving the 24-bit filtered
output code. The 22-bit composite code consists of a
14-bit code representing the differential voltage and an
8-bit code representing the common mode voltage. The
22-bit composite code is available each conversion cycle,
with no cycle of latency.
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±4-BitmDifferentialm+m8-BitmCopponmModemm
IomNatencymOut1ut
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Widem n1utmCoppon-ModemRange
Guaranteed Operation to 85°C
1.8V to 5V SPI-Compatible Serial I/O
Low Power: 30mW at 1.6Msps
24-Lead 7mm × 4mm DFN Package
APPLICATIONS
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Seismology
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Energy Exploration
The digital filter can be easily configured for 4 different
down-sampling factors by pin strapping. The configura-
tions provide a dynamic range of 108dB at 400ksps and
117dB at 50ksps. The digital lowpass filter relaxes the
requirements for analog anti-aliasing. Multiple LTC2512-
24 devices can be easily synchronized using the SYNC pin.
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Automated Test Equipment (ATE)
High-Accuracy Instrumentation
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All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents, including 7705765, 7961132, 8319673, 8576104, 8810443, 9054727,
9231611, 9331709 and Patents pending.
TYPICAL APPLICATION
ntegralmIonlinearitymm
vsm n1utmVoltage
2.5V
1.8V TO 5V
3
10µF
0.1µF
+
–
IN , IN
2
V
OV
DD
LTC2512-24
SAMPLE
CLOCK
MCLK
BUSY
DRL
SDOA
SCKA
RDLA
RDLB
SDOB
SCKB
251224 TA01
DD
ARBITRARY
DIFFERENTIAL
V
V
REF
REF
+
1
0
PIN SELECTABLE
LOW-PASS
IN
24-BIT
SAR ADC
CORE
0V
0V
FLAT PASSBAND
DIGITAL FILTER
24-BIT
14-BIT
BIPOLAR
UNIPOLAR
V
REF
V
REF
–
IN
–1
–2
–3
0V
0V
REF
GND
+
–
DIFFERENTIAL INPUTS IN /IN WITH
WIDE INPUT COMMON MODE RANGE
2.5V TO 5.1V
47µF
(X7R, 1210 SIZE)
–5
–2.5
0
2.5
5
INPUT VOTLAGE (V)
251224f TA01a
251224fa
1
For more information www.linear.com/LTC2512-24
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